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Related Components (relate + component)
Selected AbstractsTemperature dependence of positronium lifetime in cylindrical poresPHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 10 2007R. Zaleski Abstract Positron Annihilation Lifetime Spectroscopy (PALS) results for ordered mesoporous silica sieves (MCM-41 and its fibre form MSF) are used to verify predictions of the Extended Tao-Eldrup (ETE) model. Cylindrical pores (R , 1,2 nm) in these materials have well defined geometry and size, thus the structure of MCM-41 and MSF reproduces the model assumptions. Positron lifetimes were measured in the range 100-500K. In MCM-41, due to low intensity of pore related ortho-positronium component, it is difficult to determine the component's lifetime precisely. Accuracy of the lifetime fitting is better for MSF, where temperature dependence is in a good agreement with the ETE model results. For comparison, the ETE model predictions fit the lifetime of the pore related component in the Vycor sample only for T > 200 K. Below this value the lifetime exceeds the model predictions by over 30%. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] 3416: Surgical therapy of macular edemaACTA OPHTHALMOLOGICA, Issue 2010CJ POURNARAS Purpose Persistent macular oedema (ME) is the main cause of poor visual outcome during the evolution of retinal ischemic microangiopathies and traction related macular distortion. Among multiples treatment approaches, vitreoretinal surgery is applied with the goal to achieve the release of a traction related component of macular oedema . Methods Vitrectomy with peeling of the posterior hyaloid, epiretinal membranes, vitreoretinal tractions and/or internal limiting membrane removal, were studied in numerous nonrandomized cases series. Results Pars plana vitrectomy has been shown to reduce macular oedema with significant change in best corrected visual acuity, in epiretinal membranes, vitreoretinal traction syndrome and ischemic microangiopathies related macular thickening central, hemiretinal, branch retinal vein occlusion and diabetic macular edema). Evidence to date does not support any therapeutic benefit from radial optic neurotomy and arteriovenous crossing sheathotomy for BRVO and CRVO related macular oedema. Conclusion In the era of intravitreal injection of steroids and anti VEGF substances, vitrectomy seems to have a beneficial effect in traction related, selected pathologies associated to chronic macular edema. [source] Validation of the Professional Practice Environment Scale in Australian General PracticeJOURNAL OF NURSING SCHOLARSHIP, Issue 2 2010BN(Hons), Elizabeth J. Halcomb RN, FRCNA Abstract Purpose: To validate the Professional Practice Environment Scale (PPE) in Australian general practice. Methods: The PPE was modified slightly for appropriateness for the practice setting and administered to a sample of 342 Australian general practice nurses via an online survey tool. The factor structure of the 38-item PPE was examined using principal components analysis with Varimax rotation. Findings: An eight-factor solution accounted for 71.6% of the variance. Low factor loading (<0.3) or cross-component loadings were detected in eight items. A comparison of Cronbach's alpha values demonstrated little change in the deletion of eight items from four of the eight related components. Conclusions: Findings demonstrated that a 30-item version of the PPE was reliable and valid for use to assess the professional practice environment of nurses working in Australian general practice. Clinical Relevance: A tool to measure the professional practice environment in general practice is important as it will assist in monitoring the impact of the work environment on the recruitment, retention, and satisfaction of nurses in this setting. [source] Liability and volunteer organizations: A survey of the lawNONPROFIT MANAGEMENT & LEADERSHIP, Issue 2 2003J. Michael Martinez The question of how and when liability attaches is one of the most important issues facing volunteer organizations today. The liability issue has three related components: (1) whether the organization is liable to third parties for acts performed by volunteers, (2) whether the organization is liable to volunteers who are injured while performing their duties, and (3) whether an individual volunteer is liable for acts performed while working with a volunteer organization. This article explores each of these issues and suggests effective risk management practices that can reduce, although not eliminate, liability in most instances. [source] Computer-assisted interpretation of atmospheric pressure chemical ionization mass spectra of triacylglycerolsRAPID COMMUNICATIONS IN MASS SPECTROMETRY, Issue 23 2006Josef Cva Current lipidomics approaches require simple and rapid algorithms enabling the interpretation of mass spectra of lipids. Most lipids are complex mixtures of related components in which the composition of the aliphatic fatty acid chains varies from one molecule to the next. Triacylglycerols (TAGs) are an example of such a lipid class. Fatty acid chains are the only parts of the molecule to change from one species to another. Fatty acids, and consequently also TAGs, can be characterized by two parameters; the number of carbon atoms and the number of double bonds. All calculations reflecting relations among ions in the spectra can be easily made using these parameters. An algorithm for the automated interpretation of TAGs from atmospheric pressure chemical ionization mass spectra (TriglyAPCI) is presented in this paper. The algorithm first identifies diacylglycerol fragments and molecular adducts. In the next step, relations among the ions are searched and possible TAG structures are suggested. Individual features of the algorithm are described in detail and the software performance is demonstrated for the liquid chromatography/mass spectrometric (LC/MS) analysis of TAGs isolated from the termite Prorhinotermes canalifrons. Copyright © 2006 John Wiley & Sons, Ltd. [source] Forecasting stock index volatilityAPPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, Issue 1 2001Riccardo Bramante Abstract Accurate volatility forecasting is the key to successful risk analysis. In fact, volatility forecasts lie at the centre of many financial systems, such as value at risk modelling and pricing of derivative securities. This paper is concerned with how to construct stock index volatility predictors using the returns histories of the stocks that define the Index. Specifically, our approach presupposes that the total volatility of the index returns can be explained by the volatility of the related components. Copyright © 2001 John Wiley & Sons, Ltd. [source] Prevalence of the metabolic syndrome in elementary school childrenACTA PAEDIATRICA, Issue 8 2006Katrina D. Dubose Abstract Aim: To determine the prevalence of the metabolic syndrome (MS) and its related components in elementary-aged school children. Methods: Three hundred and seventy-five 7,9-y-old boys (n=182) and girls (n=193) in the eastern Kansas area served as participants. Criteria for the MS were the presence of three or more of the following components: 1) central obesity (waist circumference ,90th percentile in males and females); 2) elevated triglyceride concentrations (,1.13 mmol/l); 3) low HDL-C concentrations (,1.04 mmol/l in males and females); 4) elevated blood pressure (systolic and/or diastolic ,90th percentile, age and gender specific); or 5) elevated fasting glucose levels (,6.10 mmol/l). Results: The prevalence of the MS in this sample was 5%, and was similar across gender and race. Fifty percent of the children had no components and 15% had at least two components, with elevated blood pressure the most common component (37%). Conclusion: The MS is prevalent even in young children at rates similarly reported in adolescents. [source] | ||||||||||